What was found
FLT 246 - HNL-ITO - DIVERT TO OGG, DURING CLIMB AT APPROX 200 FT PILOT NOTICED THE NR 1 ENGINE OIL TEMPERATURE GAUGE IN THE YELLOW BAND, 140 DEGREES. CONTINUED TO FL250 FT, POWER WAS REDUCED AND OIL TEMP INCREASED TO 150 DEGREES THEN WENT OFF SCALE MOMENTARILY. THE FUEL HEAT VALVE WAS CHECK, OIL TEMP BULB CANNON PLUG CLEANED, AND NR 1 AND NR 2 OIL TEMP GAUGED WERE SWAPPED FOR FURTHER TROUBLESHOOTING. THE ENGINE WAS THEN OPERATIONAL CHECKED AT TAKEOFF AND CRUISE POWER FOR SEVERAL MINUTES. ALL ENGINE PARAMETERS REPORTED NORMAL AND THE AIRCRAFT WAS RETURNED TO SERVICE. (M)